1. "Float like a butterfly, sting like a bee. His hands can't hit what his eyes can't see. Now you see me, now you don't. George thinks he will, but I know he won't.

2. "Service to others is the rent you pay for your room here on earth."

3. "I'm young; I'm handsome; I'm fast. I can't possibly be beat."

4. "Don’t count the days; make the days count."

5. “If my mind can conceive it, and my heart can believe it—then I can achieve it." Jesse Jackson said this as early as 1983, according to the Associated Press, and Ali used it in his 2004 book.

6. “It's hard to be humble when you're as great as I am."

7. “It isn’t the mountains ahead to climb that wear you out; it’s the pebble in your shoe.”

8. “If you even dream of beating me you'd better wake up and apologize.”

9. “Braggin' is when a person says something and can’t do it. I do what I say.”

10. "I am the greatest, I said that even before I knew I was."

11. "Only a man who knows what it is like to be defeated can reach down to the bottom of his soul and come up with the extra ounce of power it takes to win when the match is even."

12. "I'm so mean, I make medicine sick."

13. "I should be a postage stamp. That's the only way I'll ever get licked."

14. “Impossible is just a big word thrown around by small men who find it easier to live in the world they’ve been given than to explore the power they have to change it. Impossible is not a fact. It’s an opinion. Impossible is not a declaration. It’s a dare. Impossible is potential. Impossible is temporary. Impossible is nothing.”

15. “He who is not courageous enough to take risks will accomplish nothing in life.”

16. "A man who views the world the same at 50 as he did at 20 has wasted 30 years of his life.”

17. “If they can make penicillin out of moldy bread, they can sure make something out of you.”

Posted!

A link has been posted to your Facebook feed.

Young heavyweight boxer Cassius Clay points to a sign he wrote on a chalk board in his dressing room before his fight against Archie Moore in Los Angeles, in this Nov. 15, 1962, file photo predicting he'd knock Moore out in the fourth round, which he went on to do.
Harold P. Matosian, AP

In this Feb. 8, 1962, file photo, young heavyweight fighter Cassius Clay, who later changed his name to Muhammad Ali, is seen with his trainer, Angelo Dundee, at City Parks Gym in New York.
Dan Grossi, AP

In this Feb. 18, 1964, file photo, The Beatles -- from left, Paul McCartney, John Lennon, Ringo Starr, and George Harrison -- take a fake blow from Cassius Clay, who later changed his name to Muhammad Ali, while visiting the heavyweight contender at his training camp in Miami Beach, Fla.
AP

The Beatles -- from left to right, Paul McCartney, John Lennon, George Harrison and Ringo Starr -- pretend to be knocked out by a fake blow from Cassius Clay (Muhammad Ali), while visiting the heavyweight contender at his training camp in Miami Beach, Florida, on Feb. 18,1964.
AP

In this Feb. 25, 1964, file photo, Cassius Clay, with flailing arms and legs, is lifted off the ring floor in Miami Beach by one of his handlers when Sonny Liston was unable to answer the bell for the seventh round, making Clay the new heavyweight champion of the world.
AP

Cassius Clay makes like a loudmouth after being declared heavyweight champion of the world at Miami Beach, Florida, February 25, 1964. The talkative Clay stopped champion Sonny Liston after six rounds in one of the greatest upsets in fight history.
AP

Heavyweight champion Muhammad Ali, then known as Cassius Clay, stands over challenger Sonny Liston, shouting and gesturing shortly after dropping Liston with a short hard right to the jaw, May 25, 1965 in Lewiston, Me. Ali was declared the winner to retain the world heavyweight title.
John Rooney, AP

Cleveland Williams is spread eagled on the canvas as referee Harry Kessler sends Cassius Clay to a neutral corner during their heavyweight bout at the Astrodome in Houston, in this Nov. 14, 1966 photo.
AP

Muhammad Ali, former world heavyweight boxing champion, toys with the finely combed hair of television sports commentator Howard Cosell before the start of the Olympic boxing trials, August 7, 1972, in West Point, N.Y.
Joe Caneva, AP

Boxer Muhammad Ali during a press luncheon in New York, Aug. 29, 1974, to promote the sale of tickets to Madison Square Garden, where the battle against George Foreman in Zaire was shown in October on closed circuit television.
Ron Frehm, AP

Muhammad Ali plays a few notes on the piano while visiting black American artists that perform in the Zaire 74 music festival in Kinshasa, Zaire, Sept. 22, 1974. At right is singer Etta James.
Horst Faas, AP

World heavyweight champion Muhammad Ali, left, points at challenger Joe Frazier at a news conference in New York City, Thursday, July 17, 1975, to promote the "Thrilla in Manila." Standing between the fighters is boxing promoter Don King.
AP

Philippines President Ferdinand Marcos, left, applauds as challenger Joe Frazier, right, makes some remarks about world champion Muhammad Ali, second from left, during their call on Marcos at the Malacanang Palace in Manila, Sept. 18, 1975.
Jess Tan, AP

At a dinner honoring the six "Outstanding Chicagoans of Today," boxing champ Muhammad Ali takes a playful poke at sportscaster Howard Cosell, as Ann Landers advises them to break it up on Nov. 11, 1977.
AP